Dust-guard for car-axle boxes



(No Model.)

1). s; STIMSON. v DUST GUARD FOR GAR AXLE BOXES. No. 351,944.

Patented. Nov. 2, 1886.

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UNITED STATES PATENT OFFICE.

DAVID S. STIMSON, OF CONCORD, NEW HAMPSHIRE.

DUST-GUARD FOR CAR-AXLE BOXES.

SPECIFICATION forming part of Letters Patent No. 351,944, dated November 2, 1886.

Application filed August 11, 1884.

In the accompanying drawings,formi ng partof this specification, in. which similar letters of reference indicate corresponding parts in all the figures, Figure 1 shows a car-axle box guard inposition.

in perspective having my improved dust Fig.2 shows a section each of the dust-guard and the holding-frame, the former in position ready to he slipped into the latter, as when in position in the axle-box.

The axle-box A may be either the kind known as the master car-builders standard axle-box, or any other car-axle box serving the purposes of same, the inner end being provided with a chamber,B, known as the dustguard chamber. Slots care formed on either side of the box opening into the dust-guard chamber, through which either section of the holding-frame Ois inserted. This frame 0 is preferably formed of iron, and is adapted by reason of the grooves cto hold the dust-guard D, which is formed of some suitable wood, (whitewood is probably preferab]e,) and made of two sections, the inner ends of each being cut semicircular to fit over the axle, the outer ends being made rectangular, or nearly so i. e.,the top and bottom sides being slightly tapered from the inner toward the outer end, for the purpose of facilitating the entrance of said dust-guard sections into the frames 0 C. These frames 00 are provided with flanges O at their outer ends, which rest against the sides of the axle-box, and extend above and below and oneither side of the slots a in the axle-box, and thus close said openings, and

I prevent the entrance of dust to the dust-guard chamber.

Packing of any suitable elastic or flexible material may be inserted in grooves 0 on the inner faces of the flanges O, for the purpose of keeping a tight joint between said flanges and the axle-box.

Serial No. 1 10,2191. (No model.)

To admit of the necessary vertical play of the frame-sections G G and the dust-guard sections D D, the slots a a in the axle-box A are made somewhat longer than is that part of the frame-sections O O which enters the same.

The frame-sections O O and dust-guard sections D D,when in their normal position, are

the dust guard at all times in direct contact with the axle.

This invention is unquestionably an im-, provement upon my United States Patent N 0. 298,253, dated May 6, 1884., inasmuch as the flanges shutting over the slots in the axlebox in said patent are constructed upon the dust-guard itself and form part of the same, and must vnecessarily be thrown away when the dust-guard shall have worn sufficiently to defeat its purposes but when constructed in accordance with my improvements the said flanges are formed upon an iron frame made in sections, and designed to hold the sections of the dustguard in position; hence the only part to wear out is the dust-guard itself, which can be easilyand cheaply replaced.

In Fig. 1 the lower partof one of the flanges O is broken out sufficiently to show one of the slots at in the axle-box A.

Having thus described myinvention, what I claim is The combination, with the axle-box A, having a dust guard chamber, and the slots a, somewhat longer than the flanges O, of the said flanges G,having groove c,the frames 0, attached to the flanges and provided with guide-grooves c, and the dust-guards D, having horizontal play in the said guide-grooves, as set forth.

In testimony whereof I aflix my signature in the presence of two witnesses.

DAVID S. STIMSON.

Witnesses:

J. B. THURSTON, NATHANIEL MARTIN. 

